PDF malware analysis — malicious · 24862cfdb57e76a7

MALICIOUS

PDF

49.1 KB Created: 2020-10-27 04:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 8561272cbe1f9a2e109148b5d2c2603b SHA-1: 95926c84efa75e9a114069f64347f40f5130e0bb SHA-256: 24862cfdb57e76a70655d1ec0c2a126a050c69bb6c06c15858f7630550a911b7

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, many pointing to other PDFs, which is indicative of a link farm or SEO manipulation tactic. One of the primary links, 'https://ggtraff.ru/123?keyword=non+isosceles+trapezoid+worksheet', is flagged as malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the nature of the link farm suggests a potential for distributing further malicious content or phishing lures.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ggtraff.ru/123?keyword=non+isosceles+trapezoid+worksheet In PDF document text
- https://cdn-cms.f-static.net/uploads/4369915/normal_5f8a7638078b8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366401/normal_5f909d0abf97b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383678/normal_5f8ced84a2375.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382208/normal_5f8d4b530565f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417327/normal_5f958f6031599.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365563/normal_5f8700a732243.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413002/normal_5f9504a7e5aa6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383804/normal_5f92bca520002.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403807/normal_5f94ce5eaac85.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390092/normal_5f91ea4797bef.pdfIn PDF document text
- https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/wopuvotawo-dasosiw-dedazijixibo-mijofuliwona.pdfIn PDF document text
- https://pisefipekopaz.weebly.com/uploads/1/3/4/4/134461515/tuwulumimeti.pdfIn PDF document text
- https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/losized_pevevigavexovo.pdfIn PDF document text
- https://risimapi.weebly.com/uploads/1/3/4/3/134321435/wadijoketobi.pdfIn PDF document text
- https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/fotivasa-dakud.pdfIn PDF document text
- https://konoxitewe.weebly.com/uploads/1/3/4/4/134494736/5953666.pdfIn PDF document text
- https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/5544638.pdfIn PDF document text
- https://xudaxeja.weebly.com/uploads/1/3/4/3/134339900/731bc7a061049e7.pdfIn PDF document text
- https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/rapuloz_vexofanibo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/99a93bba-901f-490d-ad61-3509e05edb61/komadarivit.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5cb575c4-e153-4bbe-bb02-577a21c1ba44/xitojugarurilifuv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ccd3a358-4963-46c1-a53d-ca3fdce8f936/kigudogevefu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/42aef8fe-a8d4-46dd-b9a9-6d0b6ebfce8b/4498083486.pdfIn PDF document text
- https://s3.amazonaws.com/pibajuwi/the_dictionary_of_body_language_joe_navarro.pdfIn PDF document text
- https://s3.amazonaws.com/genedonapubefe/algorithmic_puzzles_levitin_download.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006737.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6737	5336 bytes
SHA-256: `afb3ce8c940affd8c2b4069d939266fc2c6c0ed1d2a5d471bd1866f3ef17331f`
`font_01_sfnt_off00007972.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7972	11504 bytes
SHA-256: `1f40c10b2d54d3b947e93454f631876428448ef4512d1d59a334c3109043331c`
`font_02_sfnt_off0000a0d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0D4	16332 bytes
SHA-256: `7b24df8684239383cc7155326914e80e2683df120de1cda00974dbad05b4defb`

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